Speaking of pistons, how does this work:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=8022207855

Its a set of 8 Mercedes Mahle pistons for either a 420, 500, or 560 engine. How is that possible?! Each engine would have a different size piston right? More displacement = bigger pistons.....the guy must be crazy. Also, $99? Sounds incredibly false to me....

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